Hearsay

hear·say
ˈhirˌsā/
noun

1. information received from other people that one cannot adequately substantiate; rumor.
   "according to hearsay, Bob had managed to break his arm"
   synonyms:rumor, gossip, tittle-tattle, idle talk; More
   • LAW
     the report of another person's words by a witness, usually disallowed as evidence in a court of law.
     "everything they had told him would have been ruled out as hearsay"